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"Cold-set"
presses are generally in the 17-inch wide
range. This of course varies as large
newspaper presses today are also mostly
"cold-set." These "baby webs" have been
used mainly by the business forms printer
to print forms that in most cases contained
very little printing. This is why many
forms printers were called "converters"
as they tend to "convert" the forms. Today
the fastest dying print market is the
forms market. This is due to the laser
since today many business forms are generated
on a laser. Take, for example, a hotel
receipt. In years past the hotel generated
a two or three part carbonless (no carbon
required) form. Today many hotels generate
one or two laser copies instead. Restaurants
are doing the same. The customer used
to receive a two part form, if paying
by credit card, which was known in the
forms industry as a "guest check." Today
the consumer receives a laser receipt
or a non-printed carbonless or thermal
form.
The digital market (Xeikon, Indigo, etc.)
is also impacting the forms market today
as these presses can print 4-color as
well as variable information. The Internet
is also impacting the forms market with
on-line forms and on-line consumer buying.
So what are the forms printers doing about
all this you ask? Well, they are now moving
into the "Direct Mail Market" as well
as printing commercial work. At one time
the print markets were segregated by commercial,
forms, etc. The lines are becoming blurred
today as forms printers print commercial
and commercial printers add low end forms.
The big forms manufacturers such as Standard
Register or Moore are moving in other
directions thus subcontracting low volume
forms to smaller forms printers.
Cold
set press today instead of printing the
traditional business form is now printing
higher volume direct mail such as advertisements,
coupons, etc. One might think direct mail
is dead due to the rise of the Internet,
however, the market is on an increase.
Even Internet on-line companies such as
Amazon.com use the printed direct mail
market to advertise! The two medias can
work together! The coldset press manufactures
today are even gearing their small webs
to compete against sheetfed. Their motto;
"Why print 12,000 impressions per hour
when you can print 40,000?" It is because
of this shift that the smaller press are
being equipped with press consoles, IR
or UV driers, better registration systems,
etc.

So how does the cold-set press differ
from the larger heatset version? Cold-set
web implies that the ink is not dried
by heat but by absorption and/or oxidation.
Cold-set web presses are smaller presses
and generally used for business forms
printing. Press sizes from 11" to 25"
is common. While many of the functions
of the cold-set press are similar to that
of the Heatset web, they usually are not
as complicated. As they do not need heat,
no oven is needed. Small forms press also
do not usually contain a folder section.
They will, however, include a sheeter
and can run roll-to-sheet or roll-to-roll
(for future processing). The following
is a breakdown of the smaller cold-set
press:
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Unwind
stand - The unwind sections are
smaller and in most cases do not have
automatic splicing sections. Generally,
a roll is run until its completion.
The press is stopped and the spent
roll taken off. A new roll is then
placed on the unwind stand an manually
spliced into the remaining web and
the press restarted.
-
Web
Tensioner - Very similar to that
of the Heatset web press except that
the unit is usually smaller. The same
function applies - to control the
in-feeding of the web.
-
Turn Bars - Many small forms
presses utilize 뱓urn bars?which
turn the web over. Many presses are
confi gured with 5 printing units.
The printer will print one color on
the back of the web, then turn the
web over and print the remaining 4
colors on the front. If a printer
was printing a newsletter (both sides)
he would print, depending upon his
confi guration, one or two colors
on the back, turn the sheet over and
then print the other colors on the
top.
Turn
bars are metal bars laid horizontally
at a 45 degree angle from the web
direction of the press. There are
generally two bars. Most turn bars
have small air holes so the a cushion
of air assists in "gliding" the web
over the bars.
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Printing
Units - While the printing units
are similar to that of the Heatset
press, most small cold-set presses
utilize a blanket to impression system
printing only one side. Like sheetfed
presses, the impression cylinder can
be adjusted to provide maximum printing
performance. All other aspects of
the printing unit, are similar to
that of the larger Heatset press.
Many direct mail presses will use
blanket-to-blanket systems and be
slightly wider.
-
Perforating, cutting, punching, etc.
- Most forms type presses have units
following printing that will imprint
numbers, MICR codes, punch holes,
perforate the web, etc.. Imprinting
units are small, usually rubber plates
used for printing fixed information
on a form. Frequently, each of the
offset units prints the same information
on the paper web and the imprinter
designates the receiver of each part
of the form, such as Receiving, Purchasing,
Manufacturing and Sales.
Next
the web may be printed by a numbering
unit, with regular Arabic numbers
if the forms are to be consecutively
numbered, or with special MICR or
OCR numbers. There are two types of
numbering heads; fl at heads for numbering
across the web, parallel to the horizontal
perforations on continuous forms or
at right angles to the stub for unit
sets; and barrel, or convex, heads,
used for numbering parallel to the
web travel.
The printed web can then be punched.
Punched holes are used in both continuous
and unit sets to control registration
from part to part on the forms collator.
Marginal punches for continuous forms
have been standardized by the industry
so that forms can be run on any type
of equipment regardless of the equipment
maker.
In
addition to marginal punching, forms
may also be punched for fi le, loose-leaf,
or register machine holes. These differ
in their punching requirements, both
in the hole size and spacing, so several
different punching heads are needed.
Marginal punching is a precision operation;
the holes must be in perfect alignment
along both edges, with a tolerance
of only plus or minus 1/4 of 1%. Punch
units must match the plate cylinder
size in order to maintain register
with holes exactly 1/2" apart. This
is known as "throw length."
Perforating the web follows punching.
There are both vertical and horizontal
perforators. Vertical perforations
are put in with wheels mounted on
shafts. Their purpose is to provide
easy removal of the line hole punching
on continuous forms or on the stub
punches of unit sets. The tear strength
of this perforation is determined
by the number of slots per inch. The
greater the number of slots on the
wheel, the more ties will be left
on the form and the stronger the perforation
will be.
Horizontal,
or cross, perforations are made by
perforating blades mounted in slots
on a cylinder. This cylinder has the
same circumference as the plate cylinder
and has several slots in order to
accommodate a choice of form lengths.
This type of perforating is very demanding
and depends on the weight and strength
of the paper, stresses encountered
on the press and collator, and the
method used to break the forms apart.
Like vertical perforating, the tear
strength of the perforation is determined
by the number of cuts per inch and
the depth of the cuts. The fewer cuts
per inch, the stronger the perforation
and the deeper the cuts.

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Scratch-Off
ink, used mostly in direct mail
printing, is usually applied just
following the printing and prior to
perforating, punching, etc. Scratch-off
inks are usually gold or silver. They
are applied to hide a piece of printed
information. The consumer "scratches
off" the ink with a coin or finger
nail to reveal the printed information.
Scratch-offs are usually used for
lottery tickets, sweepstakes, etc.
Many
direct mail and forms presses use interchangeable
printing cylinders to accommodate different
printed sheets lengths (cutoff). Many
direct mail presses, which are very similar
to a forms press, with perforating, punching,
etc., will be heat-set for greater speed.
This presses tend to be in the 17-28"
wide range.
Typical
Business Form presses which ran print
roll-to-toll or roll-to-sheet

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